餐厨废弃油脂磺酸盐二元复合驱油效果评价

doi:10.3969/j.issn.1001-1803.2021.10.002

摘要/Abstract

摘要：

经磺化反应制备了餐厨废弃油脂磺酸盐（KWOS）,通过降低油水间界面张力性能、热稳定性能、抗钙镁离子性能和吸附损耗性能实验评价了KWOS溶液与原油间界面张力的适应性能。配制KWOS和聚丙烯酰胺的二元复合体系开展驱油实验,分析岩心渗透率和KWOS质量分数对该体系驱油效果的影响。结果表明：随着KWOS质量分数增加,油水间的界面张力逐渐降低,当质量分数达到0.175%时,油水界面张力即可降至10^-3 mN/m数量级。KWOS溶液与原油间的界面张力随热稳定时间增长、钙镁离子总质量浓度增大和吸附损耗有所增加,但仍能够维持在10^-3 mN/m数量级。随着岩心渗透率降低和KWOS质量分数增加,二元复合体系提高原油采收率均呈现先增加后降低的变化趋势,当岩心渗透率为0.421 μm ²、KWOS质量分数为0.3%时,二元复合体系提高的原油采收率最高。

关键词: 餐厨废弃油脂, 磺酸盐, 界面张力, 二元复合体系, 驱油效果

Abstract:

The salt of sulfonated kitchen waste oil （KWOS） was synthesized by sulfonation reaction. The interfacial performance between the KWOS solution and the crude oil was evaluated by measurement of interfacial tension, thermal stability, calcium and magnesium ion resistance and adsorption loss. The binary composite systems of polyacrylamide and KWOS were prepared to carry out oil displacement experiments at different permeabilities of core and various mass fraction of KWOS. The influences of core permeability and mass fraction of KWOS on the oil displacement were investigated. The results show that the interfacial tension between oil and water is gradually decreased with the increase of mass fraction of KWOS. When the mass fraction of KWOS reaches 0.175%, the interfacial tension between oil and water can be reduced to the order of magnitude of 10^-3 mN/m. The interfacial tension between KWOS solution and crude oil is increased with the increase in thermal stability time, the total mass concentration of calcium and magnesium ions and the adsorption loss, but it can be still maintained in the order of 10^-3 mN/m, indicative of a favorable adaptability to oil reservoir. With the decrease of core permeability and the increase of mass fraction of KWOS, the enhanced oil recovery of binary composite system first increases and then decreases. When the core permeability is 0.421 μm ² and the mass fraction of KWOS is 0.3%, the binary composite system shows the highest enhanced oil recovery, illustrating that there are the best conditions for the binary composite system of polyacrylamide and KWOS in enhanced oil recovery.

Key words: kitchen waste oil, sulfonate, interfacial tension, binary composite flooding system, enhanced oil recovery

中图分类号:

TQ423

王奇浩,郭海燕,王玉怡,黄小荷,张亚,龙运前. 餐厨废弃油脂磺酸盐二元复合驱油效果评价[J]. 日用化学工业, 2021, 51(10): 932-938.

Wang Qihao,Guo Haiyan,Wang Yuyi,Huang Xiaohe,Zhang Ya,Long Yunqian. Evaluation of enhanced oil recovery of the binary composite flooding system based on the sulfonate of kitchen waste oil and polyacrylamide[J]. China Surfactant Detergent & Cosmetics, 2021, 51(10): 932-938.

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编号	长度/cm	直径/cm	渗透率/μm²	孔隙度/%
1	2.53	5.57	0.126	15.39
2	2.51	5.39	0.421	18.54
3	2.54	5.26	0.760	20.26
4	2.52	5.28	1.109	23.19
5	2.54	5.54	1.523	25.48
6	2.53	5.48	0.554	20.35
7	2.52	5.38	0.562	21.37
8	2.51	5.52	0.548	22.84
9	2.50	5.27	0.571	23.01
10	2.55	5.43	0.565	24.51

表面活性剂溶液	σ×10³/（mN·m^-1）
表面活性剂溶液	吸附前	吸附后
KWOS溶液	0.92	6.53
PS溶液	6.64	35.91
KWOS和PS混合溶液	3.22	8.96